}

#include <stdio.h>

int main()

{ char s1[80],s2[40];

int i=0,j=0;

printf("input string1:");

scanf("%s",s1);

printf("input string2:");

scanf("%s",s2);

while (s1[i]!='\0')

{

i++;

//printf("i=%d, s1[i]=%c\n",i-1,s1[i-1]);

}

while(s2[j]!='\0')

{

s1[i++]=s2[j++];

//printf("i=%d, s1[i]=%c\n",i-1,s1[i-1]);

}

s1[i]='\0';

printf("\nThe new string is:%s\n",s1);

return 0;

}